Chelsea have tied down academy starlet Charly Musonda to a new deal, with the player revealing on Instagram that he has signed a four-year contract with the Premier League leaders.

Musonda has started in the club's youth side since moving to west London in 2012, scoring in the Under-21 Premier League final against Manchester United at Old Trafford and being part of victorious FA Youth Cup-winning side in last season.

The 18-year-old has yet to be handed a first professional appearance but during his second spell in charge at Chelsea, manager Jose Mourinho has pledged to promote players from the club's £30m ($46m) academy.

"I thank the club for making me and my family feel at home for the past three years, as I've enjoyed my progression in the youth teams.

"It is my dream to play in this great club in the near future, day by day working harder, no other place I'd rather be."

Despite being at Chelsea for three years, Musonda first burst on to the scene during the FA Youth Cup final, scoring in a losing cause in the first leg against Fulham, before playing a role in a Blues second-leg comeback as they claimed a dramatic 7-6 victory on aggregate.

Just nine days later, Musonda further enhanced his status as one of Chelsea's brightest young talents in the Under-21 Premier League final against United in May 2014, cancelling out Tom Lawrence's early goal with a fine strike before Lewis Baker's effort capped a glorious season for the Stamford Bridge youngsters.

Upon arriving from Anderlecht with his brothers Lamisha and Tika, Musonda was immediately identified as the most talented of the three and compared by football scout Johan Boskamp to Barcelona pair Xavi and Andreas Iniesta.

"Charly Junior is the best of all," he told Voetbalkrant.com. "He always plays with his face toward the goal that is very special at such a young age.

"He sees it as well. In his age he is a mix of Xavi and Iniesta. He is still young then you should always wait for the next year, but this year he was phenomenal, even in the national minimum 15 year olds."